impulse generator

impulse generator

An apparatus which produces very short surges of high-voltage or high-current power by discharging capacitors in parallel or in series. Also known as pulse generator.

Impulse generator

An electrical apparatus which produces very short high-voltage or high-current surges. Such devices can be classified into two types: impulse voltage generators and impulse current generators. High impulse voltages are used to test the strength of electric power equipment against lightning and switching surges. Also, steep-front impulse voltages are sometimes used in nuclear physics experiments. High impulse currents are needed not only for tests on equipment such as lightning arresters and fuses but also for many other technical applications such as lasers, thermonuclear fusion, and plasma devices. SeeFuse (electricity), Laser, Lightning and surge protection, Nuclear fusion

An impulse voltage generator (sometimes called a Marx generator, after E. Marx who first proposed it in 1923) consists of capacitors, resistors, and spark gaps. The capacitors are first charged in parallel through charging resistors by a high-voltage, direct-current source and then connected in series and discharged through a test object by a simultaneous spark-over of the spark gaps. The impulse current generator comprises many capacitors that are also charged in parallel by a high-voltage, low-current, direct-current source, but it is discharged in parallel through resistances, inductances, and a test object by a spark gap.

Contract award notice: The Contractor shall supply, deliver, install and commission a lightning impulse generator which shall be capable of delivering short duration high voltage impulses to the test loads as stipulated in the Scope of Works.

This equipment must be designed to store approximately three times the energy required for an EN 61000-4-5 impulse generator, and it must be available with taps corresponding to the capacitance measured in each PV panel prior to testing.

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